Hydrant cut-off valve.



PATENTED MAR. 3, 1908.

F. s. .S-BAGRAVB. HYDRANT OUT-OFF VALVE.

APPLICATION FILED OCT. 23. 1905 =5 cm, WASHINGTON, n. c.

FREDERIO SCOTT SEAGRAVE, OF DETROIT, MlOHIGAN.

HYDRANT CUT-OFF VALVE.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed October 23. 1905. Serial N0.'284.024-

T 0 all whom it may concern:

Be it known that I, FREDERIO Soorr SEA- GRAVE, of the city of Detroit,State of Michigan, United States of America, have invented certain newand useful Improvements in Hydrant Cut-Off Valves; and I do herebydeclare that the following'is a full, clear, and exact description ofthe same.

My invention has for its object to provide a hydrant cut-off valve whichwill not freeze up, one which will, when desired, drain the hose afterthe water is cut off and while full pressure is still maintained in thehydrant, and one which can be fitted to the hydrant without reducing thedischarge port of the latter or the stream flowing therethrough.

Another object of the invention is to provide a cut off device capableof being screwed. upon the hydrant nipples in general use; and a furtherand important object is to provide a cut-off device adapted to bepermanently carried by the hydrant and offer practically no obstructionto passing vehicles or pedes trians.

The invention consists of a device comprising a pair of members onemovable relatively to am carried by the other, and one having formedintegrally therewith internally threaded means whereby it can be coupledto the hydrant, and means being formed integrally with the other memberwhereby the latter can have the hose coupled thereto. Such members havevalvular openings adapted to register with each other when the membersare in one relative position, and the valvular openings communicatingrespectively with the means for coupling the device to the hydrant andthe means for coupling the hose to the said device.

A further feature of the invention consists of means whereby the hosecan be drained while full pressure is still maintained in the hydrant,and therefore without disturbing other streams leading therefrom. 1

For full comprehension, however, of my in vention reference must be hadto the accomanying drawings forming apart of this specihcation in whichsimilar reference characters indicate the same parts and wherein Figure1 is a longitudinal vertical sectional view of a cut-off valveconstructed according to my invention and attached to a hydrant which isillustrated in side elevation, the members of my improved cut-off beingin posimilar view with the members in position cutting off the stream,and with the relief valve operating; Fig. 3 is a detail face view of thedisk adjacent to the hydrant; Fig. 4 is a transverse vertical sectionalview taken on line A A Fig. 2 and illustrating particularly the outerdisk in face view, and Fig. 5 is a horizontal sectional view taken online B, B, Fig. 4.

A pair of disks 6 and c are retained in close contact with one anotherpreferably by a flange 0 formed upon the periphery of the disk 0 andoverlapping the edge of the disk 5 sufficiently loose, however, to allowthe disk 0 to be rotated upon the disk I). These disks have ports I) and0 respectively, eccentric ally therein and the disk I) has a small port6. A pair of coupling sleeves or collars f and g, respectively, one (f)being internally screwthreaded and adapted to be screwed upon the usualnipple h projecting from the hydrant, and the other (g) being externallyscrew threaded to have the usual turnbuckle '5 carried by the hoselength j screwed thereon.

The disks are pivotally connected together preferably by a rivet 7cprojecting through eyes m centrally of such disks. This pivot point mustbe centrally of the disks and as I prefer to use disks of as smalldiameter as possible, consequently the pivot point is located within andnear the edge of the main ports I) and 0 hence the necessity of the eyesm. When larger disks are used the centers thereof will be locatedoutside of the ports and in the substance of the disks. In order toprevent the flow of water through these ports being retarded by theeyes, or the stream to be reduced the sides of the ports are cut away asat b 0 The relative areas of the ports (1) or e and the disks are suchthat thedisk 0 can be moved to either bring the port 0 in position toregister with port I) or the portion of disk 6 between the port 6 andthe small port 6, or in position to register with such small port 6.

By moving the disk 0 to a position to cause the port 0 to register withthe port I) the water is turned on, and a reverse movement cuts off thestream. The port 6 constitutes a relief valve. The main object of therelief valve 6 is to enable the hose length to be emptied when desired,after the water has been cut off by the manipulation of my improveddevice and while the full pressure is still main- 55 sition to allow thewater to flow; Fig. 2 is a I tained in the hydrant.

The disk 0 is provided with a projection s to afford a hold for theusual firemans spanner, and enable the said disk to be rotated.

The main advantages of my improved hydrant cut-ofl valve is that thereis no place therein for water to lodge and freeze whatever position thedisks may be in, it can be quickly operated, it is simple andinexpensive to construct, and it requires no other tools to operate itthan the usual hose key or spanner in use by all firemen. Anotheradvantage is that the hose can be fully coupled or screwed on to myimproved cut-off device without turning on the stream, and furthermore,the stream can be instantaneously cut off without touching or unscrewingthe hose.

Although I have illustrated the valvular members of my improved cut-offdevice as of complete circular form, they may be arci. form, if of largeenough radius, without departing from the spirit of my invention.

The plates are assembledby forming the plate 0 with its flange c flaredsufficiently to receive the plate I), and after the plate I) is in placethe said flange is pressed over the edge thereof as shown in Figs. 1, 2and 5, thus retaining plate 0 against axial displacement.

What I claim is as follows 1. The combination with a hydrant, of acut-off valve comprising a pair of circular members adapted to lie inclose contact with each other and one rotate upon the other, meansretaining such members against other displacement than rotary, the saidmembers having eccentric ports therein, means whereby the said membersare coupled to a pair of fluid conductors, and means whereby a hose keyis rotatively connected to the rotatable member.

2. A hydrant cut-ofl valve comprising a pair of circular disks adaptedto lie in close contact with each other and one rotate upon the other,one of such disks having an integral part engaging the other disk andretaining the same against other displacement than rotary, the saiddisks each having an eccentric port therein, and one of the said diskshaving a second port therein, such second.

'port being located a distance from the first port greater than thediameter of the port in the other disk, an internally screw-threadedcoupling sleeve formed integrally with one of such disks and aninternally screw threaded coupling sleeve formed integrally with theother disk, and one of the said disks having means for the connection ofa hose key whereby it can be rotated.

3. A hydrant cut-off valve comprising a pair of circular disks adaptedto lie in close contact with each other and one rotate upon the other,one of such disks having its periphery flanged and engaging the otherdisk and retaining the same against other displacement than rotary, thesaid disks each having an eccentric port therein, and one of the saiddisks having a second port therein, such second port being located adistance from the first port greater than the diameter of the port inthe other disk, an internally screw-threaded coupling sleeve formedintegrally with one of such disks and an externally screw threadedcoupling sleeve formed integrally with the other disk, and one of thesaid disks having means for the connection of a hose key whereby it canbe rotated.

4. A hydrant cut-ofl valve adapted to be coupled to a hydrant and have ahose coupled thereto, such cut-off valve comprising a pair of. membersone movable relatively to the other in three degrees of movement, oneposition of the members relatively to one another, effecting acommunication between the hydrant and hose, a second position closingthe outlet from both hydrant and hose through the valve, and a thirdposition closing the outlet of the hydrant and eflecting an outlet fromthe hose, substantially as described and for the purpose set forth.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

FREDERIC SCOTT SEAGRAVE.

Witnesses:

WILLIAM P. McFEAT, FRED. J. SEARS.

